A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libwbclient-develUpgrade samba-develUpgrade libsmbclient-devel | May 4, 2022 | May 5, 2021 |
| Alpine Linux | — | Upgrade samba | Mar 26, 2024 | May 5, 2021 |
| Amazon Linux Ami 2 | — | Upgrade samba-testUpgrade samba-common-toolsUpgrade ctdb-testsUpgrade libwbclientUpgrade samba-commonUpgrade sambaUpgrade samba-winbind-krb5-locatorUpgrade libsmbclient-develUpgrade samba-pythonUpgrade samba-test-libsUpgrade samba-libsUpgrade samba-develUpgrade samba-krb5-printingUpgrade samba-client-libsUpgrade samba-common-libsUpgrade libwbclient-develUpgrade samba-dcUpgrade samba-winbind-clientsUpgrade samba-python-testUpgrade samba-pidlUpgrade ctdbUpgrade samba-dc-libsUpgrade samba-clientUpgrade samba-vfs-glusterfsUpgrade samba-winbind-modulesUpgrade samba-debuginfoUpgrade samba-winbindUpgrade libsmbclient | Jul 2, 2021 | May 5, 2021 |
| Amazon_linux | — | Upgrade samba | Feb 19, 2022 | Apr 29, 2021 |
| Centos_linux | — | Upgrade samba-vfs-glusterfs-debuginfoUpgrade samba-dcUpgrade libwbclient-develUpgrade samba-winbind-krb5-locator-debuginfoUpgrade ctdb-tests-debuginfoUpgrade samba-common-tools-debuginfoUpgrade ctdb-testsUpgrade samba-python-testUpgrade samba-pidlUpgrade samba-common-libs-debuginfoUpgrade samba-test-libsUpgrade samba-client-libsUpgrade samba-winexe-debuginfoUpgrade samba-testUpgrade samba-debugsourceUpgrade python3-samba-debuginfoUpgrade libwbclient-debuginfoUpgrade samba-clientUpgrade samba-winbind-clients-debuginfoUpgrade samba-test-debuginfoUpgrade samba-libsUpgrade samba-winbind-clientsUpgrade samba-test-libs-debuginfoUpgrade python3-samba-testUpgrade samba-krb5-printing-debuginfoUpgrade samba-winexeUpgrade libsmbclientUpgrade samba-winbind-modules-debuginfoUpgrade libsmbclient-develUpgrade sambaUpgrade samba-develUpgrade samba-debuginfoUpgrade samba-common-toolsUpgrade samba-winbind-debuginfoUpgrade samba-client-debuginfoUpgrade samba-commonUpgrade libsmbclient-debuginfoUpgrade samba-dc-libsUpgrade ctdb-debuginfoUpgrade samba-vfs-glusterfsUpgrade samba-winbind-modulesUpgrade samba-winbind-krb5-locatorUpgrade ctdbUpgrade samba-pythonUpgrade python3-sambaUpgrade samba-common-libsUpgrade samba-client-libs-debuginfoUpgrade samba-krb5-printingUpgrade samba-winbindUpgrade libwbclientUpgrade samba-libs-debuginfo | Jun 9, 2021 | May 5, 2021 |
| Debian | — | Upgrade samba | May 31, 2021 | May 5, 2021 |
| Freebsd | — | Upgrade samba412Upgrade samba414Upgrade samba413 | Nov 4, 2022 | May 1, 2021 |
| Gentoo Linux | — | Upgrade net-fs/samba. | May 28, 2021 | May 5, 2021 |
| Huawei Euleros 2_0_sp2 | — | Upgrade libsmbclientUpgrade sambaUpgrade samba-client-libsUpgrade samba-winbind-modulesUpgrade samba-winbindUpgrade libwbclientUpgrade samba-pythonUpgrade samba-commonUpgrade samba-common-libsUpgrade samba-clientUpgrade samba-common-toolsUpgrade samba-libsUpgrade samba-winbind-clients | Sep 16, 2021 | May 5, 2021 |
| Huawei Euleros 2_0_sp3 | — | Upgrade samba-winbindUpgrade sambaUpgrade samba-winbind-modulesUpgrade samba-client-libsUpgrade samba-commonUpgrade samba-pythonUpgrade libwbclientUpgrade libsmbclientUpgrade samba-libsUpgrade samba-common-libsUpgrade samba-common-toolsUpgrade samba-winbind-clientsUpgrade samba-client | Oct 26, 2021 | May 5, 2021 |
| Huawei Euleros 2_0_sp5 | — | Upgrade sambaUpgrade samba-libsUpgrade samba-pythonUpgrade samba-commonUpgrade samba-winbindUpgrade libwbclientUpgrade samba-common-toolsUpgrade libsmbclientUpgrade samba-clientUpgrade samba-winbind-clientsUpgrade samba-client-libsUpgrade samba-common-libsUpgrade samba-winbind-modules | Sep 7, 2021 | May 5, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade python2-samba-testUpgrade samba-winbind-clientsUpgrade samba-common-libsUpgrade samba-dc-libsUpgrade samba-winbind-modulesUpgrade samba-pidlUpgrade libsmbclientUpgrade ctdb-testsUpgrade python3-samba-testUpgrade samba-testUpgrade samba-commonUpgrade samba-test-libsUpgrade libwbclientUpgrade samba-winbindUpgrade samba-common-toolsUpgrade samba-krb5-printingUpgrade sambaUpgrade python3-sambaUpgrade ctdbUpgrade samba-winbind-krb5-locatorUpgrade samba-client-libsUpgrade samba-clientUpgrade samba-libsUpgrade python2-samba | Aug 10, 2021 | May 5, 2021 |
| Huawei Euleros 2_0_sp9 | — | Upgrade libsmbclientUpgrade libwbclientUpgrade sambaUpgrade samba-common-toolsUpgrade samba-winbind-clientsUpgrade samba-commonUpgrade samba-libsUpgrade samba-clientUpgrade samba-winbindUpgrade samba-winbind-modules | Aug 10, 2021 | May 5, 2021 |
| Oracle Solaris | — | Upgrade library/samba/libsmbclient to version 4.13.8-11.4.39.0.1.107.0 on Solaris 11.4Upgrade service/network/samba to version 4.13.8-11.4.39.0.1.107.0 on Solaris 11.4 | Nov 17, 2021 | May 5, 2021 |
| Oracle_linux | — | Upgrade python3-samba-testUpgrade samba-winexeUpgrade libsmbclient-develUpgrade python3-sambaUpgrade samba-winbind-clientsUpgrade samba-dc-libsUpgrade samba-client-libsUpgrade samba-winbind-krb5-locatorUpgrade samba-clientUpgrade samba-winbind-modulesUpgrade samba-common-toolsUpgrade samba-test-libsUpgrade samba-common-libsUpgrade samba-libsUpgrade samba-winbindUpgrade ctdbUpgrade libwbclientUpgrade samba-pythonUpgrade ctdb-testsUpgrade samba-python-testUpgrade samba-krb5-printingUpgrade sambaUpgrade libwbclient-develUpgrade libsmbclientUpgrade samba-vfs-glusterfsUpgrade samba-commonUpgrade samba-dcUpgrade samba-testUpgrade samba-pidlUpgrade samba-devel | Jun 10, 2021 | Apr 29, 2021 |
| Qnap Qts | — | Upgrade QNAP QTS to the latest version | Aug 4, 2025 | Jun 16, 2021 |
| Redhat_linux | — | Upgrade python3-samba-debuginfoUpgrade samba-common-libs-debuginfoUpgrade ctdb-tests-debuginfoUpgrade libsmbclientUpgrade samba-dc-libsUpgrade samba-vfs-glusterfsUpgrade samba-winbind-clientsUpgrade samba-winexeUpgrade python3-samba-testUpgrade samba-client-libs-debuginfoUpgrade ctdb-testsUpgrade samba-winbind-modulesUpgrade ctdb-debuginfoUpgrade samba-debugsourceUpgrade samba-common-toolsUpgrade samba-dcUpgrade samba-pythonUpgrade samba-winbind-debuginfoUpgrade samba-winbind-krb5-locatorUpgrade samba-test-libs-debuginfoUpgrade samba-clientUpgrade samba-python-testUpgrade samba-common-libsUpgrade samba-winbindUpgrade samba-vfs-glusterfs-debuginfoUpgrade libwbclient-develUpgrade libwbclient-debuginfoNo solution existsUpgrade samba-krb5-printingUpgrade samba-test-libsUpgrade samba-test-debuginfoUpgrade samba-client-debuginfoUpgrade samba-libsUpgrade samba-commonUpgrade samba-pidlUpgrade python3-sambaUpgrade samba-client-libsUpgrade samba-winbind-modules-debuginfoUpgrade ctdbUpgrade libsmbclient-develUpgrade samba-libs-debuginfoUpgrade samba-testUpgrade samba-debuginfoUpgrade samba-krb5-printing-debuginfoUpgrade sambaUpgrade samba-develUpgrade samba-winexe-debuginfoUpgrade samba-winbind-clients-debuginfoUpgrade samba-winbind-krb5-locator-debuginfoUpgrade libwbclientUpgrade samba-common-tools-debuginfoUpgrade libsmbclient-debuginfo | Jun 9, 2021 | May 5, 2021 |
| Rocky_linux | — | Upgrade samba-winbind-modulesUpgrade samba-winexeUpgrade samba-client-debuginfoUpgrade samba-common-tools-debuginfoUpgrade samba-test-libsUpgrade samba-common-libsUpgrade python3-samba-debuginfoUpgrade samba-test-libs-debuginfoUpgrade samba-winbind-krb5-locatorUpgrade samba-libs-debuginfoUpgrade samba-winbind-clientsUpgrade samba-clientUpgrade samba-common-toolsUpgrade samba-winbind-debuginfoUpgrade samba-develUpgrade python3-samba-testUpgrade samba-debugsourceUpgrade samba-client-libs-debuginfoUpgrade samba-winbind-krb5-locator-debuginfoUpgrade libsmbclientUpgrade ctdbUpgrade python3-sambaUpgrade samba-winbindUpgrade samba-common-libs-debuginfoUpgrade samba-test-debuginfoUpgrade sambaUpgrade libwbclient-develUpgrade ctdb-tests-debuginfoUpgrade samba-testUpgrade libwbclientUpgrade ctdb-testsUpgrade ctdb-debuginfoUpgrade samba-winexe-debuginfoUpgrade samba-winbind-clients-debuginfoUpgrade samba-libsUpgrade libwbclient-debuginfoUpgrade libsmbclient-develUpgrade samba-krb5-printing-debuginfoUpgrade libsmbclient-debuginfoUpgrade samba-client-libsUpgrade samba-debuginfoUpgrade samba-winbind-modules-debuginfoUpgrade samba-krb5-printing | May 5, 2022 | May 5, 2021 |
| Samba | — | Upgrade to Samba 4.14.4 or later.Upgrade to Samba 4.13.8 or later.Upgrade to Samba 4.12.15 or later. | Jun 11, 2021 | May 5, 2021 |
| Suse | — | Upgrade libsamba-passdb0Upgrade libsamba-passdb0-32bitUpgrade samba-ad-dcUpgrade samba-dsdb-modulesUpgrade samba-winbind-libsUpgrade samba-gpupdateUpgrade libsamba-errors0Upgrade samba-ldb-ldapUpgrade libdcerpc-samr0-32bitUpgrade libsmbldap0Upgrade sambaUpgrade ctdb-testsUpgrade libtalloc2-32bitUpgrade samba-client-libsUpgrade libsmbldap2-32bitUpgrade libndr-nbt0Upgrade samba-winbindUpgrade libdcerpc-binding0Upgrade libndr1-32bitUpgrade libsamba-hostconfig0-32bitUpgrade samba-libs-python3Upgrade samba-winbind-libs-32bitUpgrade samba-python3Upgrade libndr-standard0-32bitUpgrade libsmbldap-develUpgrade libtdb1-32bitUpgrade libnetapi-devel-32bitUpgrade libndr-krb5pac-develUpgrade libsamba-policy0Upgrade ctdb-pcp-pmdaUpgrade libndr-nbt-develUpgrade libsamba-credentials-develUpgrade libtevent-util0Upgrade samba-ad-dc-libsUpgrade libwbclient-develUpgrade samba-libs-python3-32bitUpgrade libtevent-util0-32bitUpgrade libndr-develUpgrade samba-32bitUpgrade libdcerpc-develUpgrade samba-winbind-32bitUpgrade samba-pythonUpgrade libndr-nbt0-32bitUpgrade libwbclient0-32bitUpgrade libndr-krb5pac0Upgrade samba-cephUpgrade libdcerpc0Upgrade samba-core-develUpgrade libdcerpc-atsvc0Upgrade samba-docUpgrade libsmbconf-develUpgrade libtalloc2Upgrade ldapsmbUpgrade libnetapi0Upgrade libsamdb0Upgrade libsamba-policy0-python3-32bitUpgrade libdcerpc0-32bitUpgrade libsamba-hostconfig0Upgrade libsamba-policy0-python3Upgrade libsamba-util0Upgrade libsmbconf0Upgrade libnetapi0-32bitUpgrade samba-develUpgrade libndr0Upgrade libsamdb0-32bitUpgrade samba-client-32bitUpgrade libsamba-passdb-develUpgrade libtevent-util-develUpgrade libsamba-util0-32bitUpgrade samba-libs-pythonUpgrade libsmbclient-develUpgrade samba-libsUpgrade libndr0-32bitUpgrade libsmbconf0-32bitUpgrade libdcerpc-samr0Upgrade libnetapi-develUpgrade samba-krb-printingUpgrade libdcerpc-binding0-32bitUpgrade libtevent0Upgrade libtevent0-32bitUpgrade libsamba-hostconfig-develUpgrade libsmbldap2Upgrade libsmbldap0-32bitUpgrade samba-ad-dc-32bitUpgrade libndr1Upgrade libldb1Upgrade libsamba-policy-python3-develUpgrade libndr-krb5pac0-32bitUpgrade samba-testUpgrade ctdbUpgrade libsmbclient0-32bitUpgrade libsmbclient0Upgrade libsamdb-develUpgrade libsamba-util-develUpgrade samba-client-libs-32bitUpgrade libsamba-errors-develUpgrade libsamba-credentials0-32bitUpgrade libndr-standard0Upgrade libdcerpc-samr-develUpgrade samba-clientUpgrade samba-libs-32bitUpgrade libwbclient0Upgrade libsamba-policy-develUpgrade libsamba-credentials0Upgrade libndr-standard-develUpgrade libtdb1Upgrade libsamba-errors0-32bit | Apr 30, 2021 | Apr 29, 2021 |
| Ubuntu | — | Upgrade samba (Ubuntu Pro)Upgrade samba | Apr 30, 2021 | Apr 29, 2021 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub